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pcjs/devices/pdp11/machine/1170/README.md
Jeff Parsons 27c41ebb94 Assorted README updates
2016-12-01 22:23:24 -08:00

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page PDP-11/70 Machine Configurations /devices/pdp11/machine/1170/

PDP-11/70 Machine Configurations

PDPjs supports a variety of PDP-11/70 machine configurations, including:

The PDP-11/70 with Front Panel also comes in a Debugger Configuration, which features a section on "Toggle-Ins" for your switch-toggling enjoyment.

Unless otherwise specified, the above configurations include 256Kb of RAM. The PDP-11/70's 22-bit architecture supports a maximum of 3,840Kb of RAM, since the last 256Kb is reserved for UNIBUS devices. The top 8Kb is known as the I/O Page, a region containing hardware registers belonging to the CPU, MMU, and assorted peripherals.